Find the Sum of the Geometric Series, If Possible $$\sum _ { i = 1 } ^ { 8 } 7 \left( \frac { 4 } { 5 } \right) ^ { i - 1 }$$

Multiple Choice

Find the sum of the geometric series, if possible.
- $$\sum _ { i = 1 } ^ { 8 } 7 \left( \frac { 4 } { 5 } \right) ^ { i - 1 }$$

A) $\frac { 11836867 } { 390625 }$
B) $\frac { 325089 } { 78125 }$
C) $\frac { 432187 } { 15625 }$
D) $\frac { 2275623 } { 78125 }$